Not counting the academics, stamina test, or written tests. How much time did your DM take?
Um... wait a minute, *counting* those, 3.5 months from "first actual class meeting" to yesterday.
Ah, I think I understand what you're asking. You want to know cumulative hours of work, specifically excluding all DM-class-specific classroom, pool, and test sessions, right?
Let's see. Only counting items from the first actual class meeting through yesterday, I worked three NAUI Scuba Diver classes, each with about 12 dry hours and two half days wet (call it 8 hours, I guess). Add in some work with an Advanced class (3 dry hours and 3 wet hours for me). Add in the special springs checkout we did for a couple divers (about 9 real hours over two days) and this weekend's checkout (about 17 real hours over three days). That adds up to... let's see... 92 contact hours.
If you want to add in lesson prep time and class prep time, those would easily put it over the century mark. I didn't track lesson prep time, but a few evenings certainly went into that. Class prep time wasn't sparse, either, as I'm not the type to settle for "adequate". Sorting and doing inventory on the class/rental gear, creating better forms for the sizing/assignment process, optimizing other practical aspects of having classes, and so on all have taken nice chunks of time, but those are the value-added bits that make you a DM that instructors love to work with.
Of course, if I count all the practical stuff from last year, I would have *considerably* more to list. Although you don't count toward ratios and you can't take responsibility for anyone, you can do all the top-side work and act as a buddy or an extra pair of eyes for the instructor underwater. Last year's practical experience is every bit as valuable to me as the DM academic work or assisting-with-classes work I added once the actual "class" started.